Anti-kick saw chain and a kick-reducing method
CA 1190123 A · Owner: Lemery, Douglas J. · Inventors: Lemery, Douglas J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, To reduce the possibility of a kick by a chain saw when cutting on the end of the bar, this invention provides cutter elements having spurs to cock the elements when the elements engage the idler sprocket on the end of the bar. As the elements begin to move in an arc around the idler sprocket the spurs ensure that the leading depth gauge of the element does not fall away to expose the trailing teeth to too great a depth of cut. Instead, at any position in the arc the spurs, ensure that the depth between the depth gauge and the tooth of each element remains substantially no greater than the depth between the depth gauge and the tooth when the element is moving in a straight line. …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.